Effects of rhizobacteria on the biology and behavior of Plutella xylostella (Lepidoptera: Plutellidae)

  • Robson Thomaz Thuler Instituto Federal do Triângulo Mineiro (IFTM-Uberaba)
  • Fernando Henrique Iost Filho Universidade de São Paulo (ESALQ-USP)
  • Hamilton César de Oliveira Charlo Instituto Federal do Triângulo Mineiro (IFTM-Uberaba)
  • Sergio Antônio de Bortoli Universidade Estadual Paulista (FCAV-UNESP)

Resumen

Plant induced resistance is a tool for integrated pest management, aimed at increasing plant defense against stress, which is compatible with other techniques. Rhizobacteria act in the plant through metabolic changes and may have direct effects on plant-feeding insects. The objective of this study was to determine the effects of cabbage plants inoculated with rhizobacteria on the biology and behavior of diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae). Cabbage seeds inoculated with 12 rhizobacteria strains were sowed in polystyrene trays and later transplanted into the greenhouse. The cabbage plants with sufficient size to support stress were then infested with diamondback moth caterpillars. Later, healthy leaves suffering injuries were collected and taken to the laboratory to feed P. xylostella second instar caterpillars that were evaluated for larval and pupal viability and duration, pupal weight, and sex ratio. The reduction of leaf area was then calculated as a measure of the amount of larval feeding. Non-preference for feeding and oviposition assays were also performed, by comparing the control treatment and plants inoculated with different rhizobacterial strains. Plants inoculated with the strains EN4 of Kluyvera ascorbata and HPF14 of Bacillus thuringiensis negatively affected the biological characteristics of P. xylostella when such traits were evaluated together, without directly affecting the insect behavior.

Publicado
2017-12-31
Como citar
THULER, Robson Thomaz et al. Effects of rhizobacteria on the biology and behavior of Plutella xylostella (Lepidoptera: Plutellidae). Revista Colombiana de Entomología, [S.l.], v. 43, n. 2, p. 195-200, dic. 2017. ISSN 0120-0488. Disponible en: <http://nexus.univalle.edu.co/index.php/SOCOLEN/article/view/5943>. Fecha de acceso: 22 jul. 2018 doi: https://doi.org/10.25100/socolen.v43i2.5943.
Sección
Artículos

Palabras clave

Palomilla dorso de la col, brassicas, manejo integrado de plagas